Apparatus for localizing and quenching explosions in mines



May 26, 1925. 1,539,091

A. KRANTZ APPARATUS FOR LOCALIZING AND QUENCHING EXPLOSIONS IN MINES Filled Malt'ch 12 1924 Patented May 26, 1925.

UNITEDSTATES ARNOLD KRANTZ, F GELSENKI RCHEN, GERMANY.

APPARATUS FOIPLOCALIZING AND QUENCHING EXPLOSIONS- IN MINES.

Application filed March 12, 1924. Serial in). 698,814.

To all whom it may concern: Be it known that I, ARNOLD KRANTZ, a German citizen, and residing at Gelsenkirchen, Germany, have invented certain new and useful Improvements in Apparatus for Localizing and Quenching Explosions in Mines (for. which I have made application for patent in Germany on March l lth, 1923, Patent No. 390,122), of which the following is a specification.

This invention relates to an improvement in apparatus for localizing and quenching explosions in mines, of the type comprising a box filled with rock dust and which is mounted by rollers on rails located on top of a drift, said box extending over the whole width of the drift and its contents being emptied into the drift at the occurrence of explosions. The novelty, above the known art, consists in the fact that the box is in a way known in the art fitted with a loose bottom which is, however, held in its normal position by said rollers which are separate from said box and bottom, while at the event of an explosion and by the air shock preceding the latter the box is somewhat displaced on said rollers whereby one end of the loose bottom gets free and thus the latter falls down into the drift together with the whole contents of the box, thereby safely and effectively localizing and quenching the explosion. The advantages of the improvement are: simple and cheap consiruction, absolute safety of operation in ease of need, complete delivery of the contents of the apparatus into the drift imme diately after said operation.

The accompanying drawing illustrates the improvement: Fig. 1 is a sectional side view, and Fig. 9. is a plan view, of the improved apparatus.

a designates the box, 6 the loose bottom therein, 0 the separate rollers mounted" on rails on top of the drift, 0? the contents .of the box consisting of rock dust; the dotted position of b, 0, (Z indicating how the apparatus operates after a short displacement of the box in the direction of arrow (Fig. 1).

\Vhat I claim, is:

Apparatus for localizing and quenching v explosions in mines, co-mprising,'in combination, a box filled with rock dust and extending over the Whole Width of a drift, a. loose bottomin said'bo-x, rollers separate from said box and bottom and mounted on rails on top of the drift and adapted to hold said bottom in its normal position, one end of said loose bottom adapted to be freed from said rollers by a short displacement of said box thereon due to the air shock preceding an explosion, substantially as and for the purpose set forth. a

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses 'lVitnesses-z S. F. K. STEPIIAN, ANNIE STEPHAN.

ARNOLD KRANTZ. 

